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Comparison of Strip Yield and Net Section Plasticity Models for a Bar in Bending With a Single Edge Crack

[+] Author Affiliations
Wolf Reinhardt, Don Metzger

Candu Energy, Inc., SNC-Lavalin Nuclear, Inc., Mississauga, ON, Canada

Paper No. PVP2017-66238, pp. V002T02A013; 8 pages
doi:10.1115/PVP2017-66238
From:
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 2: Computer Technology and Bolted Joints
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5793-9
  • Copyright © 2017 by ASME

abstract

The strip yield model is widely used to describe crack tip plasticity in front of a crack. In the strip yield model the stress in the plastic zone is considered as known, and stress and deformation fields can be obtained from elastic solutions using the condition that the crack tip stress singularity vanishes.

The strip yield model is generally regarded to be valid to describe small scale plasticity at a crack tip. The present paper examines the behavior of the strip yield model at the transition to large-scale plasticity and its relationship to net section plasticity descriptions. A bar in bending with a single edge crack is used as an illustrative example to derive solutions and compare with one-sided and two-sided plasticity solutions.

Copyright © 2017 by ASME

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